Last updated:  12/09/99

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Fish Days to Maturity Hatching Time Old Age Notes
Clown Loach 75 4 1286 I use a very large aquarium, 200 liters or more. They frequently mate but don't produce offspring.  I use pH around 7.0.  Supposedly they breed better with many low lying plants, but I haven't confirmed this yet. They seem to do better in groups of 8 or more.  They don't seem to eat their young if kept well fed.  I can get them to breed just about every day if I do the following:  speed 100x, start with pristine tank, 79.7 degrees, slightly over feed them, after 12 hours take them out and replace all the water, clean filter, wait for the chlorine to subside and put them back in.  Fry can hatch in the tank with the parents.
Angelfish 180 3 1400-1500 Acceleration at 100x works well with Angels.  Get them up to full health and watch for mating pairs.  After mating, remove other fish and wait a few hours or days until they breed. Remove eggs. Takes a couple weeks at 100x before they will breed again.
Catfish 70-76 ? ? -
Red-Tailed Shark 85-130 3-4 1950-2000 They seem to die easily from fighting each other, particularly the adults.  I usually keep sharks alone in their own tank and condition them until their health reaches 100%.  Then I put all these sharks into a file I call HealthySharks and use these for breeding.  I put all the conditioned sharks (12 or more)  together briefly until a pair mates.  This usually happens within an hour, sometimes just a few minutes if the adults are well conditioned.  I notice frequently, that the same male will mate with several females over a span of an hour or two.  Don't keep them together for too long, or their health will drop rapidly due to fighting.
Neons 120 2 ? Very easy to breed. They seem to spawn on a regular basis.
Platy ? ~20 (gestation) ? I try to get the hardness up between 7 and 8.
Molly ? ~30 (gestation) ? I try to get the hardness up between 7 and 8.
Rummy-Nose Tetra 110 ? 797 Highly sensitive to water conditions.  Removing eggs for hatching probably not a good idea. I usually drop about 300 ml of water conditioner into a 64 l tank for breeding.
Phantom Tetra 135 2 746 Highly sensitive to water conditions. Removing eggs for hatching probably not a good idea. Will eat their eggs if hungry. I usually drop about 300 ml of water conditioner into a 64 l tank for breeding. This brings the water hardness down to 3.85.  Quick way of breeding them:   separate 4 males and 4 females in two separate 100x tanks overnight (8 real hours) - equivalent to 30 days of conditioning.  Make sure they are fed fully before removing.  Then put them together in one fresh  dechlorinated tank at 10x.   They should start mating within an hour or so.  You should get eggs within 8 real hours, sometimes  within a few minutes. If you get eggs remove parents and hatch the young at 10x or preferably less.
Giga-Ziga ? ? 200 These are hardy, fast growing, short-lived live-bearers. They usually die of rust due to old-age.

Notes:

The following table shows some conditions fish bred in.

Fish Temp pH GH Tank Size (liters) HNO3 NH3 Filter No. of Eggs/Hatch
Mollies 72.3 7.35 7.6-8.1 65.4 - -    
Clown Loaches 79.7 7.0 4.0 235 - -    
Neons 79.7 6.945 4.0 65.4 - -    
Giga-Ziga 79.7 7.7 6.4 235 11 4.5    
Phantom Tetra 79.7 6.959 3.879 65.4 0 0.427 9.1% 23 1
Rummy Nose Tetra 79.7 6.958 3.909 65.4 0 0.189 52.3%  

Red-tail sharks are a bit trickier, so I have a table just for them:

Red-Tailed Sharks Breeding Stats

Tank Size 2000x768 (238 l) Brand new, clean, conditioned tank (no medication, chlorine naturally dissipated)
Temp 78
pH 7.0
GH 4.0
O 8.1
CO2 14.9
HNO3 0
NH3 0
CL 0
Mg 10
Ca 42
Filter 0% dirty (no fat, carbos, protein or vitamins in tank)
Notes Placed 3 fish into the tank and two started mating immediately.  The eggs were laid within a couple of minutes at 100x.   Immediately after breeding the health of the male started dropping (3 points) and the female started rising (1 point). Only sparsely planted (15 or 20), with the same plant, Aponogeton.  Two accessories, bogwood and Indus.
Pecking Order Sharks seem to have a definite pecking order. The older, and larger ones effect the health of the younger ones, and you will see a definite drop in health of the younger ones if you have several in the tank together.  They should be conditioned separately before putting them into a breeding tank.  After they breed, they will fight, diminshing the health of the younger one. I separate them immediately.  Use a very large (2000x768) tank with lots of plants for hiding.
Speed 100x
AutoFeeder 2 spoons/6 hours
AutoLight 12 hours On/12 hours Off
Days to Hatch 3-4
Hatching Conditions Removed parents, then saved eggs to a file (to be hatched after a reinstall). Then placed the eggs back into the same tank.
Number of Eggs 43
Number of Hatched Fry 5 (although not confirmed, a clean tank may contribute to larger number of hatched fry)
Age Health Vigor Courage Power Name
Male 1598 71 73 56 57 Cory
Female 1867 83 81 34 43 Kelsey

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